Facebook request access token and get email - facebook

Question

I have a facebook login script for my site that currently works fine. I want to add the ability to request the email from user, along with the current basic info. I know i need to request an access token, but icant quite figure out how. Here's my current code:
$facebook = new Facebook(array(
'appId' => APP_ID,
'secret' => APP_SECRET,
'cookie' => true
));
$session = $facebook->getSession();
if (!empty($session)) {
# Active session, let's try getting the user id (getUser()) and user info (api->('/me'))
try {
$uid = $facebook->getUser();
$user = $facebook->api('/me/');

Answer 1

You have to provide an extended permission for email at the time of login..
$access_token = $this->facebook->getAccessToken();
//check permissions list
$permissions_list = $this->facebook->api('/me/permissions', 'GET', array('access_token' => $access_token));
$permissions_needed = array('email');
foreach ($permissions_needed as $perm) {
if (!isset($permissions_list['data'][0][$perm]) || $permissions_list['data'][0][$perm] != 1) {
$login = $facebook->getLoginUrl(array('scope' => 'email,user_birthday',
'redirect_uri' => your site redirectUri,
'display' => 'popup'
));
header("location:$login");
}
}
$user = $facebook->getUser();
if ($user) {
try {
$userInfo = $facebook->api("/$user");
} catch (FacebookApiException $e) {
echo $e->getMessage();
}
}
print_r($userInfo);

Answer 2

Have a look at the server-side authentication process - this is where you pass through the permissions you want (known as "scope"). The user will be presented with a login panel if they are not already logged in, and then afterwards a separate permissions panel for any permissions above basic you are requesting and that they haven't already granted. You will then receive an auth token or a code that can be exchanged for a token, and you use this to then further query the user and get their email details in the response.
Good luck!